/*
 * Copyright 2012 Rivoli team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.googlecode.rivoli.model.classhierarchy

import com.googlecode.rivoli.RivoliException

import java.lang.reflect.ParameterizedType
import java.lang.reflect.Type

import org.testng.annotations.Test

class UtilitiesTest {
	@Test
	void 'type argument from subclass should be retrievable'() {
		assert Utilities.getTypeArgument(NumberList.genericSuperclass, 0) == Number
	}

	static class NumberList extends LinkedList<Number> {}

	@Test
	void 'type argument from implementing class should be retrievable'() {
		assert Utilities.getTypeArgument(StringList.genericInterfaces.find {Type type ->
			type in ParameterizedType && type.rawType == List
		}, 0) == String
	}

	static abstract class StringList implements List<String> {}

	@Test(expectedExceptions = RivoliException)
	void 'non-class type argument should not be retrievable'() {
		Utilities.getTypeArgument(RawList.genericSuperclass, 0)
	}

	static class RawList<T> extends LinkedList<T> {}
}